Question:How many two digit numbers are divisible by 5?A15B17C20D18Answer: B. 17Explanation:n=(an−a1)/d+1n=(a_n-a_1)/d+1n=(an−a1)/d+1an=95,a1=15,d=5a_n=95,a_1=15,d=5an=95,a1=15,d=5n=95−155+1n=\frac{95-15}{5}+1n=595−15+1=80/5+1=80/5+1=80/5+1=16+1=17=16+1=17=16+1=17
